4s-fe Ecu Pinout -

Power grounds for the high-current injector driver circuits. Ignition and Fuel Injector Circuits

Outputs used by the ECU to maintain idle stability and emissions control. Function Description Signal Type Idle Air Control (IAC) valve steps Pulse Width Modulation (PWM) FC Fuel Pump Relay control Ground to activate pump AC1 A/C Compressor clutch request ACT A/C Amplifier cut-off control Ground output SPD Vehicle Speed Sensor (VSS) input 4-pulse square wave How to Read Toyota ECU Board Markings 4s-fe ecu pinout

Toyota ECUs label their plugs alphabetically from left to right (usually Plug A, Plug B, and Plug C). Plug A (Power Supply & Ground Circuits) Power grounds for the high-current injector driver circuits

The and G sensors inside the distributor tell the ECU the engine is turning and where piston number one is. Plug A (Power Supply & Ground Circuits) The